Well, let no one tell you that size doesn't matter. <g> Last night I was thinking about how I went about replacing the foam in my RK05 drives. The only thing that I changed was the foam. I disconnect no wires. So, I thought that maybe platter speed may be effected by air volume. The foam on the cartridge air inlet was about 3/32" thicker than the old foam. This difference was enough to reduce the air volume into the disk pack (there is a little bump on the air inlet that pushes a door open on the pack). The extra foam I guess did not allow the door to open enough. This lack of air produces enough drag on the motor spindle to stall the motor. Mystery solved. Rich Cini/WUGNET &lt;nospam_rcini(a)msn.com&gt; (remove nospam_ to use) ClubWin! Charter Member (6) MCP Windows 95/Windows Networking ============================================